In the search bar at the top of the page, type or paste browser.cache.memory.capacity . Edit the Value:
When you visit a website, Firefox stores some of the content in memory (RAM) so that if you revisit the same page or navigate to a similar page, it can load faster. This is known as caching. The browser.cache.memory.capacity parameter determines how much memory is allocated for this caching.
When you navigate between websites, Firefox loads assets into your RAM so that hitting the "Back" button or revisiting a page happens instantly. The browser.cache.memory.capacity preference determines the upper limit of this in-memory cache.
is an integer preference located in the Firefox configuration editor ( about:config ). It dictates the size of the Memory Cache . Browser.cache.memory.capacity
Understanding Browser.cache.memory.capacity: Optimize Your Firefox Performance
In the grand scheme of the User’s computer, he was a minor bureaucrat. He didn't handle the heavy lifting of rendering DIV layers or calculating the physics of a CSS animation. He simply watched the memory pool. When the cached images and scripts grew too heavy—exceeding the bytes he was allotted—he ordered the purge.
Yes. Memory cache and disk cache ( browser.cache.disk.capacity ) are separate. In the search bar at the top of
To get the most out of your cache settings, consider these related about:config entries:
Since this preference doesn t always appear automatically in modern Firefox versions, you ll need to create it manually. Here`s a step-by-step guide:
If you notice Firefox hogging system memory to the point where other applications are crashing, you may have set the capacity too high. Revisit about:config and lower the integer, or change it back to -1 to re-enable default dynamic scaling. Changes Reverting After Update The browser
| Physical RAM | Memory Cache (KB) | Memory Cache (MB) | |--------------|-------------------|--------------------| | 256 MB | 14,336 | ~14 MB | | 512 MB | 22,528 | ~22 MB | | 1 GB | 32,768 | 32 MB | | 2 GB | 45,056 | 44 MB | | 4 GB | 59,392 | 58 MB | | 8 GB | 75,776 | 74 MB |
: If you have 16GB or more of RAM, increasing this capacity can speed up "Back" and "Forward" navigation by keeping more web elements ready in the fastest possible storage.
If you have plenty of RAM and want to speed up page navigation (especially when going "back" to a previous page), increasing this value allows Firefox to keep more items in fast memory.